Directed by: Mark Pellington
Starring: Richard Gere, Laura Linney, Bob Tracey, David Eigenberg, Ron Emanuel
Factual error: At the end, it says the cause of the collapse has never been determined. It was caused by the failure of an eyebar in a suspension chain. Also due to too much weight on the bridge.
Factual error: John supposedly goes to Chicago to talk to a mothman expert, but it shows the two of them walking into The Mellon Institute which is actually in Pittsburgh.
Other mistake: John explains to his friend Ed that, within the last two weeks since the accident, Mary has undergone brain surgery to remove the tumor in her right temporal lobe and that she is undergoing chemotherapy. This surgery alone would necessitate shaving at least half of Mary's head, and the chemotherapy would prevent her hair from growing out again for months. But, in the immediate next scene, we see John at Mary's side as she recovers in the hospital, and her red hair with natural hairline is as full and lush as in the beginning of the film.
Indrid Cold: Mary Klein cannot be found by looking. You will see her in time.
Trivia: While "The Mothman Prophecies" is a work of sensational fiction only loosely based on a few unrelated facts, it is odd that the film makers chose to actually reduce the number of people killed in the Silver Bridge collapse. In real life, 46 people lost their lives in the Ohio River that night, while only 36 were killed in the movie.